# Relationship history for MSHA mine 4404872

Current hierarchy: **Epting-Ballenger Corp → Black Energy Mining Co → No 5 Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Epting-Ballenger Corp → No 5 Strip; 1975-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Energy Mining Co → No 5 Strip; 1977-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Epting-Ballenger Corp → Black Energy Mining Co; 1977-09-01 to current/open; source msha-controller-operator-history